def test_simple(self):
"""Tests a simple use case without OrderedDeclaration."""
class ExampleFactory(object):
@classmethod
def _generate_next_sequence(cls):
return 42
holder = DeclarationsHolder({'one': 1, 'two': 2})
self.assertTrue('one' in holder)
self.assertTrue('two' in holder)
holder.update_base({'two': 3, 'three': 3})
self.assertEqual(1, holder['one'])
self.assertEqual(3, holder['two'])
self.assertEqual(3, holder['three'])
attrs = holder.build_attributes(ExampleFactory)
self.assertEqual(1, attrs['one'])
self.assertEqual(3, attrs['two'])
self.assertEqual(3, attrs['three'])
self.assertEqual(42, ExampleFactory.sequence)
self.assertEqual(set([('one', 1), ('two', 3), ('three', 3)]),
set(holder.items()))
attrs = holder.build_attributes(ExampleFactory, False, {'two': 2})
self.assertEqual(1, attrs['one'])
self.assertEqual(2, attrs['two'])
self.assertEqual(3, attrs['three'])
def test_skip_specials(self):
"""Makes sure that attributes starting with _ are skipped."""
holder = DeclarationsHolder({'one': 1, '_two': 2})
self.assertTrue('one' in holder)
self.assertFalse('_two' in holder)
remains = holder.update_base({'_two': 2, 'three': 3})
self.assertTrue('three' in holder)
self.assertFalse('_two' in holder)
self.assertEqual({'_two': 2}, remains)
def test_empty(self):
holder = DeclarationsHolder()
self.assertRaises(KeyError, holder.__getitem__, 'one')
holder.update_base({'one': 1})
self.assertEqual(1, holder['one'])
